(Reuters) -McDonald's reported a surprise drop in quarterly global comparable sales on Monday, as the burger giant struggled to hold back budget-strapped customers from opting for cheaper meals at home.

Shares of the company, which are down 15% this year, fell 1.5% in premarket trading.

Global sales fell 1% in the second quarter, its first decline in 13 quarters, compared with analysts' average estimate of a 0.53% rise, according to LSEG data.

Persistent inflation and rising prices of burger and pizza have forced lower-income group to shift to affordable food options at home, leading to muted demand in the fast food industry, including for McDonald's and Domino's Pizza.

This has prompted restaurants to launch several value bundles and limited time offers priced between $3 and $5 as they look to win back value-focused consumers.

Value meal wars have ramped up as rivals Burger King, Wendy's and Starbucks ( SBUX ) rolled out meal deals in the recent months.

McDonald's was set to extend its $5 meal offer into August at most U.S. locations after its launch on June 25.

Its CEO Chris Kempczinski said consumers were more discriminating with their spend.

U.S. comparable sales fell 0.7% in the quarter ended June 30, compared with a 10.3% jump a year ago. Sales in international markets dropped 1.1%, driven by weakness in France and compared with estimates of a 1.69% growth. The segment had recorded an 11.9% growth a year ago.

A slower-than-expected recovery in China and the Middle East conflict impacted performance at McDonald's business segment where restaurants are operated by its local partners, as sales declined 1.3% compared with a 14% jump a year earlier.

Companies like McDonald's and Starbucks ( SBUX ) have suffered from consumer boycotts linked to the Gaza war, which hit their sales in the Middle East markets.

McDonald's earned $2.97 per share on an adjusted basis in the second quarter, lower than last year's $3.17.

(Reporting by Savyata Mishra in Bengaluru; Editing by Arun Koyyur)